[R] lattice/seqplot group colors

[Dieter Menne]

I am trying to get segplot honor the groups parameter like barchart does. The
below give an incorrect display for segplot.

Any help?

Dieter

# seqplot bar coloring
library(latticeExtra)
d = data.frame(acid=letters[1:10],lwr=rnorm(10),
               essential=rep(c(TRUE,FALSE),each=5))
d$upr = d$lwr+1

# Works as expected
barchart(acid~lwr,data=d,
         groups=essential,
         par.settings=list(plot.polygon=list(col=c("red","blue"))))

# looks like groups not used
segplot(acid~lwr+upr,data=d,
        groups=essential,
        par.settings=list(plot.polygon=list(col=c("red","blue"))))




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